Sand and water feed mechanism for stone-sawing machines



(No ModeL) W. L. SAUNDERSe SAND AND WATER FEED MEGHANISM EORSTONE SAWINGMACHINES. No. 815,171. N Patented Apr. 7, 1.885.

.mmlllll ||I In mum MP7- i* @gw 7E@ www? UNITED STATES PATENT OFFICE.

WILLIAM L. SAUNDERS, OF JERSEY CITY, NEW JERSEY.

SAND AND`V WATER FEED MECHANISM FOR STONE-SAWING MACHINES.

SPECIFICATION forming part of Letters Patent No. 315,171, dated April 7,1885.

Application filed November 17, 1884. (No model.)

To all whom t may concern.-

Be it known that LWILLIAM L. SAUNDERs, a citizen of the United States,residing at Jersey City, in the county of Hudson and State of NewJersey, have'invented certain new and useful Improvements in Sand andWater Feed Mechanism for Stone-Sawing Machines, of which the followingis a specification, reference being had to the accompanying drawings.

My invention relates to that class of ma chineryemployedin stone-sawingwhere toothless metallic blades or saws are given a reciprocating motionover the stone and the cut constantly supplied with sand and water inmixture, whereby the stone is abraded or cut away. It is also applicableto machines for grinding or polishing the surface of a block of stone.

The object of my invention is to provide a means for automaticallysupplying the sandand-water mixture to the stone, said supply beingtaken from the drain beneath the stone, thus keeping up a constantsupply of the same mixture; and it consists in an improved pump andlconnections,whereby said sand and water is constantly agitated, andthereby kept in suspension during its course.

Considerable difficulty has been experienced with pumps of the ordinaryconstruction when employed for this purpose, as, the mixture being heavywith sand and ground stone, the valves become clogged and act onlyimperfectly, the piston and pump are worn away by the hard mixture, andthe sand is kept in but imperfect suspension in the water. Thelastmentioned dificulty is the most serious, for the reason that clearor nearly clear water fed into the cut in the stone will not accomplishthe desired results, a mixture of some heavy gritty substance therewithbeing absolutely necessary.

In the drawings hereto annexed, and forming part of this specification,Figure l is a View in elevation and partly in section of a stone-sawingmachine embodying my improvements. Fig. 2 is a sectional elevation ofthe discharging end of the sand-pump. Figs. 3 and 4 are detailed viewsof the lower portion and foot-valve of the pump.

Like letters o f reference have been applied drain, C, in which thewater and sand are collected as they run from the stone. A suitabletrough conveys this mixture to the tank D, from which it is elevated'tothe supplyhopper E,whence another suitable trough conveys it back to thesaw, and it again passes through the same course. A supply'of Asand andwater sufficient to compensate for waste is furnished from the boxT,which communi- Cates with the drip-trough C by pipe T, and contains asupply of sand, T2, which is stirred up by suitable jet of water frompipe T3, by which it is washed into the said receivingtrough ,whence itpasses to the tank D.

The means for elevating the mixture from the tank D to the supply-hopperE form the subject-matter of the present invention, and are as follows:Mounted in suitable guides, G, is a vertical tube, T, extending fromwithin the tank D through a central aperture in the hopper E to a pointsome distance above. This tube T is supported by a rod, It, forked atits lower end at r, and pivoted to the tube on opposite sides. The upperend of rod Ris pivoted to a crank, K,which latter is revolved by anysuitable mechanism. The lower or submerged end of tube T carries a hell,S, of a size found most practicable, and over a hole, s, in the top ofthisbell I locate a valve free to move upwardly, but closing in theopposite direction. Any suitable forni of valve may be here employed;but in practice I iind the following form to be best adapted for use andless liable to clog up or wear. A heavy ball, Q, of smaller size thanthe interior of tube T. but larger than an aperture, s, rests normallyupon and closes said aperture. A suitable stop prevents too great riseof this ball in the tube T. The upper end of said tube T carries asecond bell, S, mounted thereon, its Vaperture s', however, being of thesame size as the interior of the tube, the purpose of which is to causethe mixture forced up tube T to be more thoroughly diffused andseparated, and being at the same time thoroughly agitated,

IOO

the mixture, being spread over an extended and sharply-inclined surface,is less liable to settle and clog than if it were permitted to simplyflow out of the tube and down its sides into hopper E. It also preventsthe grit from working down the pipe and through its bearings.

The operation of my device is as follows: When the saw is set in motionby means of suitable belt or gearing, the crank K is ro- .tated and tubeT given a reciprocating motion through rod or pitman R. The downwardthrust of this tube forces ball Qupward, not only by pressure againstthe liquid in the tank, but also partly by its inertia, and a quantityof the sand-and-water mixture is received in the tube. The followingupward impulse closes the valve formed by the ball and aperture s, andcarries the load in the tube up the distance of the thrust. Thisoperation being rapid and continuous, a stream of the mixture is causedto low up lthe tube and to pour over the bell S. The rapid movement ofbell S within the tank thoroughly agitates the liquid therein, and thuskeeps the sand and powdered stone in more perfect suspension, which isespecially desirable.

I claim as my invention- 1. In a stone-cutting machine, thecombination,with a stone-saw and mechanism for operating the same, of ahopper and dischargeway adapted to collect and convey the sand and waterrunnin-g from the stone, an automaticallyoperated reciprocating pump forelevating the collected sand and water, a trough leading from the pumpto the saw, and a distributing device carried by the pump and adapted toprevent the settling and clogging of the material discharged thereby,substantially as described. L

2. In a stone-sawing machine, the combination of asand-and-water-discharge way and collecting-tank, a reciprocating tubeprovided at its lower end with an upwardly-opening foot-valve locatedWithin said tank, (whereby the contents thereof are continuallyagitated,) and at its upper end with a discharge-surface,

whereby the mixture is prevented'from-set? tling and clogging, asuitable conduit for receiving and conveying thevmixture to the stone,and mechanical connections, substantially as described, for impartingmotion to thetube.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM L. SANDERS Witnesses F. M. PIERCE, EDGAR 'INGRAHAM

